Can't go to Grizzelheim 20th level

I just started playing as a level 20 necromancer. And I got the quest to take me to Grizzleheim, but I can't go into The pace that takes you to the words (center of the tree), I wan wondering what's up?? Because no matter what I do it won't let me to the transporter. Please help!!

You probably haven't unlocked the world tree after beating Wizard City if you can't go into the world tree. I would suggest to use the world gate to either ask someone to add you and take you to the world tree, OR beat Wizard City and unlock the world gate yourself